AEGLIX vulnerability intelligence
CVE-2026-42221
HIGH · CVSS 8.1 · Analyzed
Published: 2026-05-04 · Updated: 2026-10-26 · Source: NVD
Stored catalog record
Source record retrieved 2026-10-28T10:19:58.639936+00:00. Scheduled imports handle updates; this page does not assert that the provider was queried just now.
Vulnerability overview
Nginx UI is a web user interface for the Nginx web server. From version 2.0.0 to before version 2.3.8, an unauthenticated network attacker can claim the initial administrator account on a fresh nginx-ui instance during the first-run setup window. The public /api/install endpoint is reachable without authentication, and the request-encryption flow only protects payload confidentiality in transit; it does not authenticate who is allowed to perform installation. A remote attacker who reaches the service before the legitimate operator can set the admin email, username, and password, causing permanent initial-instance takeover. This issue has been patched in version 2.3.8.
Patch review priority
Assess exposure and vendor guidance
- No higher-priority signal is available in the current stored evidence.
FIRST EPSS: 1.34% · percentile 71.2 · score date 2026-10-27.
EPSS estimates probability of exploitation in the next 30 days. It does not measure your exposure or prove exploitation. The elevated threshold is 10%; CISA KEV takes precedence. About FIRST EPSS ↗
Severity and scoring
- CVSS score
- 8.1 · HIGH
- CVSS version
- 3.1
- CVSS vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-306
CVSS measures technical severity; it does not establish whether this vulnerability is being exploited in your environment.
Known exploitation and remediation
Not listed in the CISA catalog retrieved for this record. This does not establish that exploitation has not occurred.
Verify affected versions and patch availability in the vendor advisory before making changes.
Affected products and versions
cpe:2.3:a:nginxui:nginx_ui:*:*:*:*:*:*:*:*
From (inclusive): 2.0.0
Before (exclusive): 2.3.8
These are NVD CPE applicability entries. Some products depend on configuration conditions; consult the official record to confirm applicability.
Advisories and references
- https://github.com/0xJacky/nginx-ui/releases/tag/v2.3.8
Release Notes
- https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-h27v-ph7w-m9fp
Exploit · Mitigation · Vendor Advisory
- https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-h27v-ph7w-m9fp
Exploit · Mitigation · Vendor Advisory